World number two Sabalenka was on a streak of 15 victories in a row, claiming titles in Cincinnati and then the US Open for the first time.
World number two Sabalenka defeated Jessica Pegula 7-5, 7-5 to add a maiden New York crown to her back-to-back Australian Open titles.
Aryna Sabalenka won her maiden US Open title on Sunday after beating USA's Jessica Pegula in straight sets at the Arthur Ashe Stadium.
The sixth-ranked American came through 1-6, 6-4, 6-2 and will take on world number two and Australian Open champion Aryna Sabalenka in Saturday's championship match.
Double Australian Open champion Sabalenka triumphed over the 13th-seeded American 6-3, 7-6 (7/2) and will face either Jessica Pegula of the United States or the Czech Republic's Karolina Muchova in Saturday's final.
World number two Aryna Sabalenka demolished Olympic gold medallist Zheng Qinwen to reach a fourth successive US Open semi-final on Tuesday.
Alexander Zverev and fellow Grand Slam veteran Grigor Dimitrov look to make the US Open semi-finals on Tuesday
Coco Gauff joined Novak Djokovic and Carlos Alcaraz on the US Open scrap-heap Sunday as the defending champion crashed out to Emma Navarro in a blizzard of mistakes.
Aryna Sabalenka, whose 2024 season opened in triumph at the Australian Open only for heartache and injury to intervene, has found renewed joy as she aims to close the year on a high at the US Open.
Aryna Sabalenka thrust herself into US Open title contention on Monday with a 6-3, 7-5 defeat of Jessica Pegula to win the ATP/WTA Cincinnati Open.